General Information:
Chemical Formula:
Na4(Ca,Mn)Si6O14(OH)2
Composition:
(Molecular Weight = 562.27 gm)
Sodium 16.35 % Na
Calcium 5.35 % Ca
Manganese 2.44 % Mn
Silicon 29.97 % Si
Hydrogen 0.36 % H
Oxygen 45.53 % O
Empirical Formula:
Na4Ca0.75Mn2+0.25Si6O14OH2
IMA Status:
Approved IMA 1982
Physical Properties:
Cleavage:
[010] Good, [101] Indistinct
Color:
violet pink.
Density:
2.55
Hardness:
5.5-6 - Knife Blade-Orthoclase
Luster:
Vitreous (Glassy)
Streak:
white
More details...